Is there any way I can reboot my R1 without having to empty the battery?

The case is I have a crash in the "memo" application and when ever I turn off and on the device I go back to the same frozen memo window
I cant leave it, the computer wont see the device, very hard to empty the battery because my screan turns off every 30 secs (I choose this option in the sittings) and the brightness is the lowest so I get the longest battery life.